Free Tool
Dataset Change Monitor
Upload two versions of a CSV dataset — baseline and updated — and identify every added record, removed record, and modified row. View changes by category and download a complete change report.
Files never uploaded
Downloadable change report
Client-side processing
Your data never leaves your browser. Both files are compared locally using JavaScript. No data is uploaded, stored, or transmitted.
Baseline dataset (original)
Drop baseline CSV here
New dataset (updated)
Drop updated CSV here
Comparing datasets…
How comparison works: Rows are matched using the first column as a key. If your dataset has a unique identifier column, place it first for the most accurate results. Rows without a value in the first column are skipped.